Portable conveyer



Oct. 11, A SHAW PORTABLE CONVEYER Filed Jan. 20, 1930 3 Sheets-Sheet 1 l Fulci..llclslnlllllnlelnln- Oct. 11, 1932. A SHAW 1,882,096

PORTABLE CONVEYER Filed Jan. 20, 1930 I5 Sheets-Sheet 2 y MM Oct. l1, 1932.

A. sHAw ORTABLE coNvEYER Fiieduan. 2o, 1930 3 Sheets-Sheet 5 Patented Oct. 11, 1932 ARTHUR I.. SHAW, DECEASED, LATE orv oIoERo, ILLINoIs, BY BERTHA s. SHAW, Ramon: TRIX, or QICERO,` ILLINOIS,AV AssIGNoR To oHIoAeai AUTOMATIC ooNvnYoR co., `or

cIoERo, ILLINOIS, A CORPORATION or ILLINOIS PORTABLE CONVIYER Application area January 2e, 1930.; serial NO Azieio.

The present invention relates generally to portable conveyers whichl are adapted for use 1n moving coal, coke, crushed stone, grav el or other such material from a pile on the `ground to a wagon, lpit car, or another con# mechanism associatedvtherewith for driving" the conveyer-element, and a wheel-equipped frame which serves to support the conveyerrame so that the discharge end thereof may he raised or lowered in order that the same may be adjusted tothe proper height for discharge onto the wagon, pit car or second conveyer with whichY theconveyer-ramev is associated.v

` One object of the invention is toprovide a portable conveyer of the type under consideration embodying means of an improved character for adj ustably supporting the conveyerframe with respect to the Vwheel-equipped frame; i

Another object ofthe invention is to provide a portablehconveyer of theatoreinentioned type in which the frame that serves to support adjustably the conveyer-frame is equipped with a pair of flanged wheels at the sides thereof for travel on apair of rails, and

embodies mea-ns which operates, during raising of the conveyer-frame, to cause the flanged wheels to be elevated out of engagement with the rails into a position wherein the conveyer vmay be readily derailed.

Another object of the invention is. to provide a portable conveyer in which the sides of the conveyer-frame are formed of wrought metal plates which are arranged to form a compartment for housing the motor for the conveyer element and the power-transmittin g mechanism which is driven thereby.

A further obj ectofA the invention is to provide a novel lubricating system and an improved power-transmitting or driving mechanism Jfor a conveyer-element ofthe chain and drag bar type. l

A still further object of the invention is to provide a portable conveyer which is eliicient in operation7 may be manufactured at a comparatively low cost and is generally of an improved character.

Other objects of the invention and the various advantages and characteristics of the present construction will be apparent to those skilled in the art from a consideration of the following detailed description.

`The invent on consists in theseveral novel features hereinafter set forth and more particularly defined by the claims at the conclusion hereoit.- f

ln the drawings which accompany and* form a part of this specification or disclosure and in' which like numerals of reference denote corresponding parts throughout` 'the several views:

Figure l is a vertical longitudinal section' of a conveyer embodying theinvention ;y

Figure 2 is a plan view, parts being shown l in section for purposes of illustration;

Figure 3 is a perspective view; Figure 4 is a side elevational view illustrating in detail the manner in which the derailing means operates to cause the Yflanged wheels to be elevated out of engagement with the subad] acent portions of the rails when the conveyer-frame is raised;

Figure 5 is an enlarged transverse'section`v taken on the line 5 5 of Figure l;

` Figure 6 is a detail of one ofthe oilingdevices of the lubricating system for the conveyer element and Figure 7 is a detail view ofV a part of .the

gearing which forms the power-transmitting mechanism between the motor and the end` less conveyer element.

rlhe conveyer which forms the subject matter of the invention is adapted for use in moving coal, coke, crushed stone, gravel or othersuch material from a pile on the ground to a wagon, pit car or second conveyer, and

comprises an elongated conveyerfframe 1G.

The latter is associated with a wheelequipped trame l1 so thatit may be properlyl positioned with respect to the material to be conveyed and may be moved from one place to another.

The conveyer-trame 10 consists of a pair of sides, each of which is made upY vof a series of Wrought ymetal plates 12, 13,l

' 14 and 15. The plates of each side are weldedor riveted together so as to form arigid structure.. The plates 12,.13Yand.14,of thcl conveyer-rame -frm the receiving end eti the conveyer and are sa arranged that such end is of an inclined character. he plates ltorm the discharge -end of the-eenveyer,v

extend horizontally andi are-reinforced ai ed orotherwise secured to the plates 14. The two sides of the conveyer-frame arecross con4- nected by a substantially,impertorateapron v ,15 17. The latter extends from one end of the eonveyerfframeto the-other and underlies the and, verticallyj, extending; legs Y19?.' Y Ther legs 19'@1x lit againstand `:are weldedto the -bottom 1 face 4.off the apr.-on.,17V fllhelfverticallyj extending legs 19Hy depend. from the legs 19? andv 255e are riveted to the wrought metal plate swhichj forlntheqsidesnot theconveyer.-rann'e.y The receiving ,end ,of xthe apron z17 isinclined and @teClS-:ulwafllytfrom-tl@1319336512# ih e. Wh'iehyareV-securedjtetlreqextreme rear ends'.l discharge portion'o the apron extends horif gflazontally andlis` positioned 1 midway between the. topand ,bottom ff edges Vof the plates,-

Thelowerpgortions ofthe pilates lfor'mqwith the zapronva, a .foompazrtmenti20i y :The lower. part of this compartment is closed-by allottom;pzlate`21zwhichfis secured in any suitable manner l.to-..the :bottom ,margins of the; plates 13.- The frontendofthe bottom. plate'. 1s;ex

tended soL aste .underlie thereceiving end of f the apron 17 andis securedto the bottom mar- ,-gins ofv thefplates12.,l flfheffrear,l endo-f the bottoinplate 211is. disposedbeneath thel plates V14.4extendss.horizontally. andi is asssociated: with a..pair,of,angle iron bars22., The latter comprise, horiZontallyextendin-fg legsr22aiand s vertically extending. legs. 22,6; e .The` horizon-V tallyiextending Alegs 22d fit against, the. top

' face 'of the plate, 21;l and lare riveted or other: wiseV secureduin place.. The` verticallyT ex-V tendinglegsr22l'of thebars'22extend upwarch 59 ly from the legs 22'and are. secured attheir `rontends to the plates. .13.1 Tlie -rearend's of.tl1fe;b'ars22..are support-ed 'in' spaced rela tion. Awith. respectitotheplates..14loygan outer Jertieally extendingpair ofangleiron uprights g 231 fand :an inner; vertically extending -pairjof uprights-24. Theuprights-23 Acomprise longi tudinally. extending; legs-23 Vand laterally ex'-,

tending. legs23b The lupper endsof fthef'legs i H 23? fare; riveted to thel reinforcing; plate *16; y The lewe-rends ofithe longitudinally extendsV ingglegs 23- are-'rivetedztothe rear endsxof the' legsl22loffthe oai-$22.11. The. laterally extendfk ing flegs .-23b of, theuprights 23'extend out-v 4 The .upi rights 24(comprise` longitudinally extending;

65, Wardly. withrespectfto the legs 23?:

, which -areeinounted on Aafshait .30.V 'Ehe glatten iis monntedinfa .castinetal bbotplate 61 which viron loars. rlhe latterare secureduit@thee i t-he uprights 24 are riveted to the reinforcing A plates'16. The lower ends of said legs 24a 'rl'hef-endlessLconveye-rlelmentlS-cemprises a p air of chains 26 which areassociatedwith thesid'esotlie conveyer-frame and arecross connectedby.. dra-g.b ars 27. Y r'lhe latter are provided 'at'tlie ends 'thereof with brackets e) 28whiclnarefseeuredto. opposiftely,-tacingpai1s of: cha-inn linkse .'lli'eireceiving ends et t the.l conveyerrcliainsyl 26ffextendl around 1 an' l i are. supported i by. afpalirl ot sprocket; wheels-29 isfseeured ato the front-rends; ot the plates;A I12.-

'i and zisgfadaptedgto; rest upon the?ground.y i The Y.

dicharge ends: tot; the conveyerr cha-ins extend around andere sup@ lontedloy` a1; pair ofwlreelsg 99; 32 fwliich arevmeunted: lon-a shaftl 33.;A The lati vis-journa-llednin':a: pair Gfbealilgfg ofgthei herizontally extending plates:15.1:` )The drag;- bars; Y 27; duringq travel; in; "the-;.1ippe r reaches; of the :conveyer chain-s,.-res't v uponythe apron:E 17 'andfservefto' dragtheanaterialjthat E isfvt'o be'fconveyedg-romf. one Jen-d5. of, thee conf,

conveyer, :chains are, covered by afpair oiupper--marginal .partssof'the' plates-12,; 1 35114 and Iaandg;arenprovided with inwardlyvex'f tendingP legs-Bwhich .extend- :overlandcover theupperireaches otitheic'hain's-26.: rllhelowerv le' reachesf .ther-conveyer. Chainsarey s upported';A

at the rear ends thereof by a Vpair. of angle ironfba'rsa'. Theelatteraresecuredito-fthe l'oWergma-rginal parts:oatlrdhorizontally ex:-

tendinggpl-ates 15.' iandfarefprovided .fwith-'f in: l wardly fextendingahorizontal @legs-3&9; f'Iliew. frontif ends: oitVV theulower. reaches'oftlre; con-A veyer. chainszarel supportedvby-f, a'lpair a of idler wheels 3751 a; pairfzo idler f wheelsflv` and ,f

par efliaierewheeisea. rimaiieeWiens er: 11e

are mounted -oniafnross'sha-t 4@ vvlriclrfi-s,ljournal-led invbearings 411 on the plates flz; The-z idler v wheels-"are mounted 'on' fa ,crossfshaft 3 42 ywliiclrv extenfclsvaeross therentrai-ice'te, z the n colinprartfment'20` and 'isfj ourn-alled in bearings: *if 43;on:fthe-p1atesf13 -Theafidlervw'heels `39,;1are mounted .on aicrossshaft 44iwhichf is located l adj acent the-I cen-tral'f fpertion yottlre plates 13 and 'f is j o-u-rnalledcinaa ip air f of ibearing l-lo-loeks 45.1 The latteraregslidably meunftedand are-.- adapted :tonloegA shiftedHoyaffpair. of flooltsy 46 inf order to; take:v npthe-slaclninsth'e el-iains126.` Y k.vTheeconveyereleinentflrzisidriven byzanelectric emot-or 147,whiclioisfineuntedfonethe i rear end ofthe bottom platecQl;fandnsndis- -''l posed beneath the plates 14 of the conveyerframe. The driving connection between the motor and the conveyer elementcomprises a sprocket 48 which is fixed to one end of the rotor shaft of the motor; a sprocket wheel 49whic-h is fixed to a cross shaft 50 and is driven from the sprocket 49 by an endless' chain 51; a sprocket 52`which is fixed to the cross shaft va sprocket wheel 53 which is mounted on a cross shaft 54 and is driven from the sprocket 52 byan endless'chain 55; and a pair 'of sprockets 56 which are fixed to the crossshaft 54 and serve to drive the conveyer chains 26. The cross shaft 50 is journalled inv a pair of bearings 57 which are secured to the rear ends of the plates 13. The cross shaft 54 is mounted in a pair of bearings 58 and is positioned so that the sprockets 56 engage the conveyer chain between the idler wheels 38 and 39. The bearings 58 arev secured to the plates 13 of the conveyerframe. The sprocket wheel`53 is drivably connected to the cross shaft 54'by means of a collar 54a. The latter is keyed to the cross shaft and rigidly connected to the sprocket wheel 53 by means of a bolt rlhis boltL operates as a safety device in that it shears off whenever the conveyer-element 18 becomes locked for any reason and thus prevents breakage of the chains 26. The sprocket wheel 49 and the chain 51 are disposed in the compartment'20.

Oil or a similar lubricant is applied to the p conveyer chains 26 by a pair of horizontally plates 13 of the conveyer frame.

extending lubricating devices 59 and 60. These devices are preferably formed of a piece of pipe and are disposed above the lower reaches of the conveyer chains. he device 59 is located between the sprocket wheels 29 and the idler wheels 39 and extends through aligned apertures 61 in the One end of the device 59 is closed by a cap 62 which fits against the outer face of one of the plates 13. The'other end of the device 59 is provided with an upwardly extending filling or elbow 63 whichformsl an inlet 63 for receiving oil. A pair of openings 59l are formed in the bottom portion of the device 59 and permit the oil to flow drop by drop onto the conveyerchains. The Vinlet 63 is normally closed by a removable cap 64. The lubricating device is similar in construction to the device 59, embodies a pair of discharge openings 60 and is located between the idler wheels 38 and the sprockets 56. By locating the device 60 in the manner set forth, the links of the conveyer chains are provided with oil prior to contact thereof withthe 4 sprockets 56.

The frame 11 comprises a pair of flanged wheels 65 which are adapted to travel either on the ground or on a pair of rails 66. The hubs 65 of the wheels are rotatably mounted on the ends of an axle 67 which is positioned beneath the rear end of the bottom plate 21 and serves to support the wheels so that they are located outwardly of the sides'of the conveyer-frame. The axle 67 is secured by U- bolts 68 to the central parts of a pair of channel. iron beams 69. rlhe latter comprise laterally extending flanges 69SL and .69Pand are arranged so that such flanges extend outwardly. The ll-bolts `68 extend through the flanges 69b and are held in place by nuts 70.

`The beams 69 are pivoted at the front ends Y the beams 69. rlhese beams are. arranged so that the flanges thereof project outwardly. The lower ends ofthe beams 7 2 are pivotallyl connected by bolts 73 to a pair of brackets`74 which are rigidly secured to the rear ends of the flanges 69a of the beams 69. rllhe upper ends of the vertically. extending beams 72 are provided with a pair of angle ironbrackets 75. These brackets comprise horizontally extending legs 75lL and vertically extending legs 75b and are arranged so that the horizontally extending legs rest on the upperends of the beams 72. The brackets 75 are held in connected relation with respect to the i channel iron beams 72 by means of brackets 76. rlhe latter are attached tothe upper. ends of the beams 72 and are provided with out-v wardly extending legs 76L which lap and are rigidly secured to the horizontally exl tending legs v75a of `the brackets 7 5. A pair of bearing members 77 are secured by bolts 78 to the legs 76a ofthe brackets 7 6. These bearings support rotatably a shaft 79 which extends through and is vertically movable in the guideways 25, and ,is-providedY with a pair of pinions 80. These pinions are fixedly secured to the shaft 79 and mesh with a pair of racks 81. with the uprights 23 and are mounted on vertically extending angle ironbars 82 which are rigidlyR secured to the longitudinally extending legs 23a. When the shaft 7 9 is rohe latter are associated n tated in one direction, the pinions 8O` operate to shift upwardly the racks 81 and thereby elfect raising of the discharge end of the conveyer; Reverse rotation of the shaft 7 9 causes the pinions 80 to lower the racks 81 and the horizontally extending discharge part of the conveyer-frame- The shaft 79 is rotated to effect the desired raising or lowering of the conveyer-frame by means Vof a lever 83 which isv loosely mounted on one end of said shaft 79 and is provided with a pawl 84. The latter operates in conjunction izo iso

witlrafratchet wheel85which is iixedly se'-l cured tothe ,shaft 79. 'Vhen the `lever 83 is shifted in fonedircction, the shaft-79 is caused through themedium of the pawl and ratchet wheel,'to rotate the pinions so kas to elevate theconveyer-frame 10.y Reverse rotation ofthe shaft 79 is normally prevented by a dog 86 which is pivotally connected to a pin 87 on the leg 75bef the .bracket 7 5rand cooperates with ratchet wheel 88.? The` ratchet wheel 88 is liXedly `secured to the shaft 9 inwardly ofthe ratchet wheel84; When it is desired to lowerthe conveyer frame, the dog 86 is swung out of engagement with'zthe ratchetwheel88. In this position. of the-dog,the Ashaft 7 9` is free so lthatA it may" be'rotated in a reverse direction inorderto permit'of the lowering of the conveyerframe. The racl; and pinion connections -(8 O,

81)together with the` vertically extending channel iron beams 72, exemplifyjmeans of; an improved character for supporting the conveyer-franie 10 adjust-ably with respect the wheel-equipped frame 11.

In some instances it lis desirable to 'derail the conveyer so thatit may be wheeled on the ground from one place to another. ,To permit of ready derailmental legV 89 is provided.

rlhis leg is preferably formed of channel iron and has one end thereofpivotally connected i* to the central portion of the bar 71 by means of a bolt 90. Y The leg is of such length thatl when it is swung downwardly into a verticalv position, the lower end thereof, is adapted to rest directly upon the. subjacent ground.:

LWhen the leg 89 is in its operative'position raising of the conveyersframe by manipula-v tion ofthe lever 83 causes the conveyer to be elevated into a positionV wherein it may be readily derailed.A yThis is caused for the reason that the leg serves as a vsupport or fulcruin for the rear end ofthe wheel-equipped frame 1l and raising of the conveyer frame tends toelevate the front Vends ofthe channel iron beams 69. Since the'wheels are carried by the ,central parts of the beams 69 itis manifest that upwardswinging movement of said beams with the leg as a fulcrum causes the'V wheels to beelevated with respect: to the rails into the position indicated by dotted lines in Figure'l. Then the conveys-r is supported by the leg 89V vand the Vwheels 65 are elevated with vrespect to the rails, deraihnent may be effected simplyby pushing the con-y p is secured b y a bolt 92 to one end of the barV veyer sidewise in Vone or the opposite'direction. The leg 1s carried, when in its inoperative position, by a hook or stirrup 91 which 71 and is adapted to receive the4 'distal end of the leg and to support the leg in ahori# zontal position. y l Y The operation of the conveyer will'be as follows: l 1 y l Y Assuming that the whe-els 65 of the 'frame l1l are supported o n rails 66, the conveyer v is wheeled into a position wherein theieceiving end thereofrests upon for is positioned adjacent to the material that isvtobe'ele-vated or conveyed. The conveying operation Y started by applying electrical energy orl cur rent to the motor 47. Drivefof,y the 'motor `serves to actuate the -conveyer -felenient through the medium of thevarious chain and Vsprocket connections." During actu-ationfof the conveyer element 18 the material: isgshov-V elled ontol the receiving end Vofl the; conveyer where it is engaged by the drag bars 27 andv propelled over the apron 17 to .the discharge end of the conveyer.l lDuring operation oft e conveyer chains thelubricati'ng devicesf59 and A cause drops`l of oil to'be fed tothe chains for lubrication purposes. 1 If thecon- `veyer element becomes locked by'- reason of material jamming into engagement withthe chains 26 or for anyotherfreason the sprocket wheel 53 operates tol shearthe "bolt 55a.- As sconfa's the bo'ltbec'omes shearedythe motor 47 imparts no' further drive movement .to the shaft 54 and hencecannot causebreakage of the chains 26.

In the kevent that it shouldbe desiredto Vderail the conveyer 'so that 'it maybe trans,-

ported or movedon the-ground from one place to another, the leg 89'is swung out ofsupf" perte'd relation with respect ltoVA thel stirrup 91 and positionedin a vertical position as in. dicated in Figure 4. The-lever83 is then re-. ciprocated back4 and. forth tol :cause through vthe medium ofthe pawl and ratchet and pintion, the leg 89 swingssidewisejandcauses `Vthe conveyer to beshifted so'that'the wheels are deposited on the ground` After the olerailinent operation, the conveyer element. may be lowered by swinging-the dog 86 out of engagement with the ratchet wheel 88'.I Dis.-

engagement of the dog releasestheshaft 79 so that it permits the conveyer-fraineto lower by gravity. The lowering'operation may be controlled by holding or retardingmovement ofthe'lever 83. lVhen the ,conyeyer-frarne is lowered to the. desired position, the, dog 86 is swung back intoengagement with lthe ratchet wheel 88 so as to lock` the .shaft 79` against rotation.Y Raising of theconveyeryframe is accomplished 'by 4reciprocating the lever 88, as vpreviously pointed' out,soas to cause rotation of the shaft 7 9 through `the pawland ratchet connection84 and85. Ro-

tation of the shaft 79 causes the pinions 80 to raise or force upwardly the racks 81. The shaft 7 9 which is located at the upper ends of the channel iron beams 7 2 is conned between the uprights 23 and 24 and therefore cannot be displaced in a forward or rearward direction. Y

The conveyer disclosed herein is exceedingly efficient in operation by virtue of the fact that the chains of the conveyer element 18 are lubricated and the various driving instrumentalities are housed in the compartment 20. Since but a few parts are used the conveyer-may be manufactured at a comparativelyk low cost.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what is claimed as new Vand ldesired to be secured by Letters Patent, is:

l. In a portable conveyer, the combination of an elongated frame having one end thereof adapted to rest upon the ground, an endless conveyer means Vcarried by and operable in said frame, a structure for sustaining the other end of the frame pivotally connected at one end thereof to the frame and embodying a pair of wheels, an upstanding beam having the lower end thereof connected pivotally to the other end of the structure, and means for raising and lowering the said other Y end of the frame comprising a pinion rotatably mounted at the upper end of the beam and a rack connected iixedly to the frame.

2. In a portable conveyer, the combination of an elongated frame having one end thereof adapted to rest upon the ground and provided at theeentral portion thereof with means forming a substantially vertical guideway, an endless conveyer means carried by and operable in said frame," a structure for sustaining the other end of the frame pivotally connected at one end thereof to the frame and embodying a pair of wheels, an upstanding beam having the lower end thereof connected to the other .end of the structure and provided with a member at its upper end eX- tending through and slidable in the guideway, and means for raising and lowering the said other end of the frame comprising a rack and pinion connected between the frame and the beam.

3. In a portable conveyer, the combination of an elongated frame having one end thereof adapted to rest upon the ground and provided at the central portion thereof withV means forming a substantially vertical guideway, an endless conveyer means carried by and operable in said frame, a structure for sustaining the other end of the frame pivotally connected at one end thereof to the frame and embodying a pair of wheels, an upstand- -ngbeam having the lower endthereof pivot- Vally connected to the otlierendof the strucrovided at its upperend with a ture and horizontal y extending .shaft proyecting .through and slidable in the guideway, and means for raising and lowering the said other `end ofthe frame comprising a pinion on the shaft and a rack secured to the frame adjacent. the guideway.'

4. In a portable conveyer, the combination of an el on gatedframe having one end thereof 'adapted torest'upon the ground and pro- -vided at the central portion with a pair of uprights spaced apartnto form a *vertical guideway, ank endless conveyer means carried by and operable in said frame, a structure for sustaining theother end of the frame piv-v otally connected. at one end thereof to -the frame and embodying a pair of' wheels, an upstanding.beamv having the lower end there- 'of ypivotally'connected to the other end of the structure and provided at its upper end with a horizontal lshaft extending through and slidable in the guideway,an`d means for raising and lowering the saidljother end of the frame comprising a pinion on the shaft and a rack secured to oneof the uprights.

i V:5. In a portable conveyer, the combination of an elongated frame having one end thereof adapted to restupon the ground, an end- Vless-conveyer means carried by and operable Y in said frame, astr'ucture for sustaining the 'vmeans to cause the structure to be shifted into a position wherein the wheels are raised off the rails upon which tlieyare adapted to travel. i 1

p 6. In a portable conveyer, the combination of an elongated .frame having one end thereof adapted to rest upon the ground, an endless conveyer means-carried by and operable in said frame, a structure for sustaining the other end of the frame embodying a -pair for raising and lowering the said other end of the frame with respect to the wheelequipped structure, and means 'operative in response to raising of the frame to cause the structure to be shifted into a position wherein the wheels are raised off the rails upon which they are adapted to travel.

7. In a portable conveyer, the combination of an elongated frame having one end thereof adapted to rest upon the ground,an endless conveyer means carried by and operable in said frame, a structure-for sustaining the other end of the frame pivotally connected-at one end thereof to the frame and embodying- V of wheels adapted to travel on rails, means "1.15

cause'the structureto be lifted itoa; position l -o which theyerev rftclapted totravelff *Y 8. In a, portable conveyerg-'thecombination Vat ts'centralportionfa parir offwheelsada'pted j. -to travelon rails; meansiforraisingandflowverng the .said other end roftheframe rela;-

.i tively toV said structure; andfafflegmounted ori .thebther endf of the structure'and 'operar :i tvexnresponse to raising? of the 'rameto' .of an'elong-ated .framehavngone endthereofadaptedtojrest uponthegroundgan vend'- Y less conveyer means'ca'lrriedfby and'operable lvin said frame, a; structure orsustaiuig'the other endofatheff-rame pwotally .corrneete'drat v onefend: thereof to thedraiefaud; embodying at its central `portion a' .p'ar'o wbeelstadapted v. .to travel on rails;meansgiorraisirrgandflowyvering the sa-id othenendof theramerelal tively-:tosad 'structuref and/at flegrpvotally con'n'eted tov the other 'end o the structtxre f and adapt-'ed vto bel swungi downwardlyintla positionwheren itzis operative irnfresponse to raising ofthe-frame' to 'cause zthe'wheels :tobe

9. In meehanismforconveying material, `5 vthe combination of al1-elongated supporting frame comprising sides', an endlessl conveyer- 1 supported between'the sidesofthefrale and eonsstngfof a- (pair, of chains AandA drag 'bars '-1' between the'chans andfmechahismi'folidrvsing theconveyer'embodynga motor; afshaift journfjtlledirbthelsdesf of: the frameand provided Y with 2a '-drve membersV rigidly :secured thereto, -a Wheel drivenby -thefmotorf and loosely mountedon thev shafft f adjaeent'f'said Vdriving member,.w pairl of sprockets engagingtlle'chansjandconneetedftofbe drivenby the shaftjztnd a.- driving'1 connection between thegear. and thea-ioresad:memberfcompris- Y inge boltextendnb' through said? wheelfand :lr'f

member, sad.' boltA en'g'f adapted; rwhen the conveyer is locked or jammed, to be sheared 'zfi' so as to render moperatlye-theseonveyer drlvtinggmeehanismafnd thereby preyentbrekalge of :hecha-i11s. A

BERTHA SHAW; 

